Auxiliary blade attachment for bulldozers



P 27, 1955 A. E. ANDERSON 2,718,719

AUXILIARY BLADE ATTACHMENT FOR BULLDOZERS Filed Nov. 23, 1955 2Sheets-Sheet 1 August Elmer Anderson IN VEN TOR.

Sept. 27, 1955 A, E. ANDERSON 2,718,719

AUXILIARY BLADE ATTACHMENT FOR BULLDOZERS Filed Nov. 25, 1955 2SheetsSheet 2 Fig. 2 4

iiillllHiTil August Elmer Anderson IN V EN TOR.

( BY fin AUXILIARY BLADE ATTACHMENT FoR 'BULLDOZERS u s Elm r'and a IsMi Application November 23, 1953, Serial No. 393,562 2 C a m ((21. 31-1This invention relates to a bulldozer attachment and more specificallyprovides a device for detachable attachment to a conventional bulldozerblade wherein an auxiliary blade is prOvidedin. forwardly spacedrelation to the ordinary bulldozer blade thereby making the conventionalbulldozer more versatile, wherein the auxiliary blade may be utilized inback-filling ditches, grading wet spots and other operations whichcannot be easily carried out by the conventional bulldozer.

A primary object of this inventionis to provide a bulldozer attachmentfor attachment to a bulldozer blade having "a concave blade normallyfacing the bulldozer blade for back-filling or the like.

Another objectof this invention is to provide a bulldozer attachmenthaving an adjustable concave blade spaced forwardly of the conventionalbulldozer blade wherein the auxiliary blade may be used for pushing orpulling material.

' A further object of this invention is to provide a bulldozerattachment which may be adjusted in angular relation to the conventionalbulldozer blade and which may be adjusted in longitudinal relation tothe conventional bulldozer blade.

Yet another object of this invention is to provide abulldozer attachmentwhich may be utilized for attachment to the conventional bulldozer bladeor may be utilized in place of the conventional bulldozer blade oneither crawler type or rubber type vehicles having hydraulic, electricor cable operated mechanism.

A still further object of this invention is to provide a bulldozerattachment which is universal in adaptability, versatile in use, simpleand rugged in construction, and easily assembled and disassembled to itsoperating position.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure l is a perspective view of the bulldozer attachment of thisinvention secured to a conventional bulldozer blade and projectingforwardly therefrom;

Figure 2 is a side elevational view of the structure of Figure 1;

Figure 3 is a top plan view of the construction of Figure 1;

Figure 4 is a side elevational view of a modified form of bulldozerattachment; and

Figure 5 is a detailed side elevation showing another modified form ofthe bulldozer attachment.

Referring now specifically to the drawings, it will be seen that thenumeral generally designates the bulldozer attachment of this inventionfor attachment to a. conventional bulldozer blade 12 having the usualmounting members 14 attached to the bulldizer (not shown). Theattachment 10 may be attached to any type bulldozer 2,718 ,719 PatentedSept. 27, 1955 having any .type operating mechanism forthe bulldozerblade 12.

Referring now specifically to Figures 1 3, .itwilll be seen that theattachment 10 includesan elongated. plate 16 having an inwardly andupwardly inturned lower edgelfi whichfits under and. around the bottomof the bulldozer,

blade 12. The UPPer end of the plate 16 is providedtwith a horizontalportion 20 and a downwardly extending portion 22 which engagestherearofthe upperedge of the bulldozerblade 1 2. A clarnpbolt .24ispositionedtbetween the depending portion ,22 and the plate 16 therebyurging the depending portion 22. against .the rear surface of the blade12 thereby securely clamping theplate 16 to the bulldozer blade 12.Apair of vertically aligned and vertically spaced pivot lugs.26 are.disposed on the plate 16 at each remote edgethereof andeach of the lugs26 pivotally supportsa longitudinally extending support member 28 in thenature of a tubular pipe. Each of the tubular support members 28slidably receives a second support,me mbera30 in telescopic relation..The outer end ofthetubular member .28 is provided with a plurality ofholes 32 and the member 30 is. maintained in adjusted position by atransverse. pin 34 which functions in an obvious manner. The outer endsof thesupport members30 are securedto a concaveblade 36 pivotallymounted on the lower of the support members 30 on an axis 38 which islocated at substantiallythe centerof the blade 36. The-remote ends of,the upper support members 30, are attachedto suitable lugs .40, on theconvex surface of the blade 36. A brace member 42.extends between thelower support member 30 and the lug. 40. for retaining the supportmembers 30 in rigid relationship. .A pairvof cross-braces 44 arepivotally attached on-lugs .46 located on the inner surface of thetubular members 28 adjacent the plate 16 and are slidably attached tolugs 48 ha ng elongat d slotsfifitherein adjacent the outer end of thesupport members 30 wherein the support members 30 and 28; may betelescopicallyadjusted and the crossr ces 44. ret inthe members .28 and30 incorrect and rigid relationship. A lug 52 similar to the lug 40.is.se-

qured toeachendpfthe .platec36 atthe bottom thereof and by disconnectingthe bolts 54 and a bolt 56 holding an adjustable brace 58 to the concaveportion of the blade 36, the blade 36 may be pivoted about the axis 38wherein the concave portion of the blade 36 is facing forwardly or inthe same direction as the concave surface of the bulldozer blade 12. Thebrace 58 includes a pair of strap members having a plurality oflongitudinally spaced apertures 60 for longitudinal adjustment of thebrace 58. The brace 58 is pivotally attached to a lug 62 on theundersurface of the support member 30 and a lug 64 on the concavesurface of the blade 36 adjacent the lower edge thereof. When the blade36 is pivoted about its axis 38 so that the concave portion facesforwardly, the brace 58 is attached to the lug 40 and it will be seenthat it will be necessary to extend the brace 58 substantially as shownin phantom in Figure 4.

Referring now specifically to Figure 4, it will be seen that thebulldozer blade 12 includes a rearwardly extending flange 13 on itsupper edge. A clamping member 66 includes a pair of spaced hook members68 and 70 for selective engagement with the flange 13 and a clamp bolt72 is provided for urging the respective hooks 68 and 70 into engagementwith the flange 13. In the specific embodiment as illustrated in Figure4, the hook member 68 engages the flange 13 for securing the plate 16 tothe blade 12. However, in some installations, it may be necessary toutilize the hook 70 to engage the flange 13, and in the specificembodiment as shown, the hook portion 70 engages the rear surface of theblade 12, thereby stabilizing the assembly. Pivotally attached to eachof the upper of the lugs 26 is a strap member 74 having a plurality oflongitudinally spaced apertures 76 for adjustably mounting a verticalportion 78 of a modified frame member 80. The modified frame 80 includesa pair of longitudinally extending support members 82 which includesvertically spaced rod members braced in' rigid relation by suitablevertical braces 84 and angular braces 86. Upper braces 88 connect theupper portion of the support member to the vertical member 78. The outerends of the support members 82 are attached to the blade 36 in the samemanner as employed in Figure 1.

In the device as shown in Figure 5, the frame 90 is modified and theupper and lower support members 92 are secured together with the usualbracing 84 and 86 and a hydraulic piston and cylinder arrangement 94 ispivotally disposed between the upper of the lugs 26 and 'the inner endof the upper support member of the frame 92. The plate 16 in thismodification is held on the rearwardly extending flange 13 by ahook-shaped solid member 96 held thereon by a clamp bolt similar to 72.

The'operation of the device will be readily understood. The plate 16 isattached to the bulldozer blade 12 in an obvious manner and with theblade 36 positioned with the concave surface thereof facing thebulldozer blade, the attachment 10 may be used for backfilling ditches,back-grading wet spots and smooth backgrading. With the blade 36 havinga concave surface facing forwardly, the device is utilized as anextension of the bulldozer blade 12 and may be efiiciently utilized inplaces where the bulldozer cannot have access. In the specificembodiments as shown in Figures 4 and 5, the attachment may be adjustedin angular relation to the bulldozer blade thereby making the attachmentmore versatile and useful. The attachment of this invention greatlyincreases the versatility of a bulldozer and makes the bulldozer usablefor many jobs for which it was previously unsuited to perform.Obviously, any well known materials may be utilized in the constructionof this device, and it will be understood that the various braces andsupporting members may be constructed of such a size to meet therequirements of this particular device.

From the foregoing, the construction and operation of the device will bereadily understood and further explanation is believed to beunnecessary. However, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction shown and described, andaccordingly, all suitable modifications and equivalents may be resortedto, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. A bulldozer attachment comprising a plate, clamp means associatedwith said plate for attaching said plate to a bulldozer blade, anelongated frame pivotally connected to and projecting forwardly of saidplate, means for adjusting said frame about said pivotal connection withsaid plate, a concave blade pivotally mounted on the outer end of saidframe, said concave blade having the concave portion normally facingsaid plate, said frame including upper and lower spaced longitudinallytelescoping support members.

2. A bulldozer attachment comprising a plate, clamp means associatedwith said plate for attaching said plate to a bulldozer blade, anelongated frame pivotally connected to and projecting forwardly of saidplate, means for adjusting said frame about said pivotal connection withsaid plate, a concave blade pivotally mounted on the outer end of saidframe, said concave blade having the concave portion normally facingsaid plate, said frame including upper and lower spaced longitudinallytelescoping support members, slotted lugs attached to said supportmembers, and cross braces extending between said support membersengageable in said slotted lugs.

References Cited in the file of this patent UNITED STATES PATENTS1,473,890 Toy et al. Nov. 13, 1923 2,197,549 Hargrave et al. Apr. 16,1940 2,285,706 Gaddis June 9, 1942 2,416,654 Taylor Feb. 25, 19472,483,033 Baker Sept. 27, 1949 2,566,562 Hale Sept. 4, 1951 2,613,912Jordon Oct. 14, 1952 2,648,358 Lower Aug. 11, 1953 2,677,203 Poirier May4, 1954

